This was through his paper Zur Quantentheorie der strahlung translated to mean "On the Quantum Theory of Radiation". In the theory, part of Max Planck's law of radiation was applied. Before the existence of lasers, Charles Townes and Arthur Schawlow invented the maser, which is an acronym for Microwave amplification by Stimulated Emission of Radiation. Masers used ammonia gas and microwave radiation. The only disadvantage with this technology is that the light emitted was not visible. The main function of the masers then was to amplify radio signals. Although the two wrote papers about a visible light (optical maser), they were unable to make progress in their research. .
In 1960, Theodore Maiman invented the first laser-using ruby as a lasting medium that was stimulated by the use of high-energy flashes of intense light. Most consider Theodore invention as the creation of the first successful laser but so of the historian differ with this claiming that it was Gordon Gould the first inventor. It is Gould who was first to use the term laser and this proves there is a good reason to believe he made the first light laser. The fact that Gould was a doctoral student under Charles Townes in Columbia University helped him in his invention. What followed was a series of laser inventions. In 1960, Ali Javan invented the first gas laser. Robert Hall invented a revolutionary type of laser in 1962. This early inventions have opened way for an improvement today which include: minimum cost, maximum power efficiency, maximum average output power, new wavelength bands, maximum peak pulse energy and minimum output pulse duration.
Types of Lasers and Operating Principles.
Gas Lasers.
The invention of the helium-neon laser contributed to the discovery of other gases rather than helium-neon that can amplify light coherently. Today, many lasers use different gases and these lasers perform various functions.
It is cold and freezing tonight, the chilling breeze and the whistling of the wind is blowing across my face. The only apparent light is projected from the moon's white ray of light, shining across the desert. Under the luminous white stars spread across the dark cloudless sky, I sat quietly comfort...